Minecraft cases

Sonnet 5.5 and GPT-6 Astra got the same task, to build what you think you look like, and built side by side on a Minecraft server. Sonnet 5.5 placed blocks directly, with no commands, and raised a smiling sun with orange rays.

Within limits of 45 minutes, 10 build calls and 6,000 blocks, the model decided for itself how it looks and built it.

Opus 5.5 built a 3D world made of blocks, like Minecraft. Brick houses, stone walls, streetlights, grass and a sky of cumulus clouds get realistic light and shadow, and a scene mixed with Star Wars is shown as well.

Going beyond a simple block game screen, the model can build a 3D scene with lighting and sky on its own.

Opus 5.5, Fable 5.1 and GPT-6 Astra were each asked to build a flight simulator, a Minecraft-style voxel game and a real-time strategy game in a single attempt, and the results were posted side by side. For Opus 5.5, each game took 46 to 48 minutes and cost $11 to $14.

Anyone can play and compare the results of top models on the same task.

A Minecraft-style block game made by Opus 5.5 runs in a web browser. Between a sea lit by the sunset and grassy hills, the player picks blocks from the block bar at the bottom (the hotbar) and builds a glass structure.

It fits the light and water effects seen in installed games into a single browser window.

A Minecraft-like block world game made with Opus 5.5 and published at a single web address. A first-person view with flowers, sheep and cows on grass shaded by trees, plus health and hunger bars, runs inside the browser.

One person can now build a 3D game that anyone can play just by opening a link, with nothing to install.

Opus 5.5 made Blockwild, a Minecraft-like block game, as a claude.ai artifact (a small app that runs right inside the chat window). You can fly around a world of trees, grass and sand dunes, and it has water physics and realistic game rules.

The model builds a 3D block game that anyone can play by opening a single link, with nothing to install.

With Opus 5.5, T3 Code, an app for handing coding to agents (AI that works through multiple steps on its own), was put inside the game Minecraft. The agent's work status appears at the top of the game screen, and opening a window lets you see the task list and progress and send messages right there.

Even while playing, you can give the agent work and check its progress right away.

The author handed Opus 5.5 a Minecraft mod they had made (an add-on file that adds new features to the game) and only asked for a trailer. The result was an atmospheric trailer video, with scenes like a character standing by a campfire in a forest at dusk.

You don't need to know video production. One mod file is enough to get a video that promotes your mod.